The article does not say whether the scientists experiments with dogs have （）
A、benefited animals other than dogs
B、served man
C、helped other dogs
D、contributed to medical knowledge

答案

A

试题解析:【答案】A 【考情点拨】事实细节题。【应试指导】根据文章最后一段可知，科学家们对狗的实验有助于医学研究，不仅为人类作出了贡献，也使狗免于狂犬病和瘟热等疾病。但文章没有提及实验对其他动物有益，故选A。

The article does not say whether the scientists experiments with dogs have （ ） A、benefited animals other than dogs B、served man C、helped other dogs D、contributed to medical knowledge